About Japanese power generation container house BESS
The Hirohara Battery Energy Storage System (BESS) is located in Oaza Hirohara, Miyazaki City, Miyazaki Prefecture. The 30MW/120MWh battery is Eku’s first in Japan, and the company has agreed a 20-year offtake agreement for the project with Tokyo Gas.
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About Japanese power generation container house BESS video introduction
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6 FAQs about [Japanese power generation container house BESS]
What drives energy storage adoption in Japan?
Shunsuke Kawashima, who works across Itochu’s BESS business at all scales including residential, commercial and industrial (C&I) and utility-scale, opened the discussion by highlighting the drivers for energy storage adoption in Japan, of which he said there are two: increasing renewable energy generation and increasing demand for electricity.
What are the requirements for battery energy storage in Japan?
There are a series of requirements to be eligible: projects must have a minimum capacity of 1 MW, the battery must be able to participate in various markets, and the battery must be directly connected to the grid. Energy storage in Japan consists of thermal storage, hydro, pumped hydro, and Battery Energy Storage Systems.
Where is Bess based in Japan?
It announced its first 11MW/23MWh project in Osaka Prefecture, west Japan, in partnership with utility Osaka Gas in June. The company also entered a partnership with Australian developer Akaysha Energy for utility-scale BESS projects in Japan a while back, which it announced in September.
Who owns the battery storage facility in Japan?
Project financing has been arranged by MUFG Bank representing the first battery storage project they have arranged finance for in Japan. Under the offtake agreement, Eku Energy will own the BESS while Tokyo Gas will own 100% of its operating rights for 20 years, with Eku Energy responsible for the ongoing maintenance of the facility.
How much does a Bess cost in Japan?
The BESS will more than double Japan’s utility-scale lithium-ion battery capacity, and increase national energy storage capacity in megawatt hours by 220%. To be developed at a cost of 91 billion yen (USD 600 million) over a six-year period, construction on the BESS is expected to begin in 2026.
What is the Hirohara battery energy storage system?
The Hirohara battery energy storage system is Eku Energy’s first project in Japan set to reach Financial Close and our latest global project that combines our global energy storage specialisation coupled with our deep local presence. We are pleased to be partnering with Tokyo Gas as offtaker as we together accelerate the energy transition.


